How to match a bitmap and a checkbox (radiobutton) in a window ?

Hi,

      I draw a bitmap in a window and i want to use checkbox and radiobutton within this window. How can i do to match these two window controls background color with my bitmap ? In theory, i must initialize the background color of these controls to Transparent to prevent these backgrounds to overwrite the bitmap, so, the only things you can see are the text (checkbox & radiobutton) and the mark.
Must i use WM_CTLCOLOR, in which way ......

Thanks
marsAsked:
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NickRepinCommented:
I don't know, what programming system you use: OWL, MFC...
But here common answer.

In your window's procedure you must process WM_CTLCOLORBTN message:
 
 case WM_CTLCOLORBTN:
     HWND hButton=(HWND) lParam;
     // Here make sure hButton is your bitmap's check/radiobutton handle
     // .....
     // Create background brush
     HGDIOBJ hBrush=GetStockObject(NULL_BRUSH);
     return (LRESULT) hBrush;
 
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